GSM Gateways work by inserting a normal Mobile SIM Card into the device, and once signal has been found the device is cabable of routing numbers out via the SIM Card. The typical solution would be to route mobile calls via the SIM card, effectively turning the call from Landline to mobile, to Mobile to mobile, cutting the cost by over half.
GSM Gateways come in various different shapes, sizes and languages, by languages I mean protocols, e.g. ISDN30e/PRI, ISDN2/BRI, Analogue and VoIP Including H.323 and SIP, depending on what is needed for the company.
For example, for a typical 2 person company, the most cost effective would be the analogue device and connect this to the original analogue line (just like your home phone)
GSM Gateways also come with other features including inbound routing, Mobility solutions and overseas solutions - but we wont get into that, its much more technical - I should know, I installed them for a living!
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There is no such thing as GSM gateway fraud. It is the cell phone carriers who are calling it as a gateway fraud. There is a gadget that is called a GSM gateway, which is basically a cellphone (GSM module), that can connect to the internet. What it does is to help you save international long distance calls, by using the internet. Of course the cell phone carriers are not happy about it since they can no longer earn money from your international long distance calls. That is why cell phone carriers will say that it is a "GSM gateway fraud". If it is true that GSM gateway calls are fraud, then internet is also a fraud, VOIP calls are also fraud, since they bypassed the international gateways of local carriers, that includes cell phone carrier and PSTN carriers.
There is no such thing as GSM gateway fraud. It is the cell phone carriers who are calling it as a gateway fraud. There is a gadget that is called a GSM gateway, which is basically a cellphone (GSM module), that can connect to the internet. What it does is to help you save international long distance calls, by using the internet. Of course the cell phone carriers are not happy about it since they can no longer earn money from your international long distance calls. That is why cell phone carriers will say that it is a "GSM gateway fraud". If it is true that GSM gateway calls are fraud, then internet is also a fraud, VOIP calls are also fraud, since they bypassed the international gateways of local carriers, that includes cell phone carrier and PSTN carriers.
There are many good GSM gateways available on the market. Some of the better GSM gateway options available include the 2N Voice Blue Next and the Raspberry Pi.
AnswerYES !!! GSM Phones, CDMA Phones will work in India
You will need a media gateway in order to connect a GSM network to PSTN lines without the need for a PBX or key system.
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RAZR WILL WORK WITH BOTH GSM & IDEN THE PROGRAMING MAKES THE DIFFERANCE
Yes they do.
a phone with these two facility can work in GSM with sim card and can work without sim card in cdma mode
There are two types of cell phone networks, GSM and CDMA. As long as the network you are trying to move your unlocked phone to is compatible then yes it will work. In most cases a GSM phone will not work on a CDMA network and vise versa, however, some careers (such as Verizon) have support signals for GSM phones. There is no support for CDMA phones on a GSM network at this time. So for overall versatility, GSM phones are better.
Gateway products often utilize unusual sizes of hardware to make sure you have to go through them to get replacement parts. Another Gateway battery is guaranteed to work, but if you can find another that is the same dimensions it should work just as well.